Manifold-sheet.



PATH-TED MAY 19, 1903 H. M. HAY. MANIFOLD SHEET.

APPLIOATION FILED NOV.'11. 1901.

iro MODEL- FIG.

Patented May 19, 1903.

PATENT OFFICE.

HOWARD rMORTON HAY, OF BROOKLYN, NEW YORK.

MANIFOLD-SHEET,

SPECIFICATION forming part of Letters Patent No. 728,461, dated May 19, 1903.

Application filed November 11, l901. Serial No. 81,943. (No specimens.)

T0 @ZZ whom, it may concern:

Beit known that LHOWARD MORTON HAY, a citizen of the United States, residing at Brooklyn, in the county of Kings,State of New York, have invented certain new and usefulV Improvements in Manifold-Sheets, of which the following is a specification.

The object of this invention is to provide a manifold-sheet adapted toY produce upon the impression-sheet against whichit is placed a duplicate copy in permanentcopyingor non-` use of manifold-sheets consisting of thin hard paper, upon the surface of which is placed a coating consisting of soot or carbon and an adhesive material, and manifold-sheets have also been made for the purpose of obtaining more durable copies by placing upon the surface of paper sheets soluble ink or dye composition which when transferred to the im` pression-sheet4 and moistened in the act of press-copyingpermeates the impression-sheet and makes a permanent ink record. My manifold-sheet diters from these in that I employ instead of the hard thin paper which is ordinarily used for such purpose a thin bibulous paper vthinly coated on one side with a tough flexible impervious substance, and I saturate the paper with any of the well-known non-drying inks now generally used on typewriter ribbons, Whether soluble in water or not, the ink being applied in its luid state and saturating the paper Vthrough to the impervious coating on the back. This manifoldsheet differs in its properties from thoseher'etofore manufactured in several Ways. The

ink when transferred tothe impression-sheet makes the same permanent copying or noncopying record which is made from a typewriter ribbon Without the necessity of moistening the impression-sheet.

The bibulous `paper retains a much larger quantity of ink or coloring-matter than can be retained upon the surface ot' the ordinary hard tissue-sheet which is generally employed, and hence will last much longer. Owing to the porous character ofthe paper and the fluid nature of the ink repeated use of certain portions of the paper, as when the type falls on the same parts ot' the paper repeatedly, will not exhaust the coloring-matter from such parts nor cause them to print distinctly fainter than the unused parts after the manifold-paper has been used a few times, vfor the reason that the ink is constantly drawn by capillary attraction to I' `the points fromwhence ink has been transferred by the impression of the type to the impression-sheets. The flexible impervious coating while providing a clean side to the sheet holds the libere of the latter together at the back of the sheet and returns them to their normal position after the impression of the type, and thus prevents the destruction ot' the sheet.

In preparing my new manifold-sheet I take a thin bibulous paper similar to ordinary blotting-paper, but much thinner, and I coat it upon one side with a thin coating of collodion, which dries almost as quickly as it can' be applied. A non-drying ink, either copying'or non-copying, such as is commonly used on type-writer ribbons, is then applied inits iiuid state to the opposite side of the sheet, the latter becoming thoroughly saturated therewith. The collodgipnppating on the back of the sheet is inerious to tlnk and is sufticiently tough and flexible vto yield without breaking under the impression of the type and by its adhesion to the fibers of the paper returnsthe latter to their normal condition. plus ink, if any, is removed from the surface of the manifold-sheet by pressing any suitable absorbent sheet against it, and the manifold-sheet is then preferably exposed to the atmosphere for a sufficient length of time before using to permit the ink to become evenly distributed throughout the fibers by capillary attraction and the outer surface to become dry enough to be handled Without smearing. Having thus f ully described my invention, what I claim, and desire to secure by Letters Patent, is-

1. Asa new article of manufacture, a mani- The surfold-sheet consisting of a thin bibulous paper having a coatingl on one side impervious to ink and saturated through to said coatn g with a non-drying ink.

2. As a new article of manufacture, a manifold-sheet consisting of a thin bibulous paper having a exihle coating on one side impervious to ink and saturated through to said coating with a non-drying ink.

3. As a new article of manufacture, a mani- 

